| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 342149000 | Monopulse | 29 |
| 20100123617 | METHOD AND SYSTEM FOR MONOPULSE RADAR TARGET ANGLE DETERMINATION - A method for determining target angles based on data received from a monopulse radar array antenna includes receiving from a beamformer that generates beams from signals generated by the monopulse radar antenna signals having data indicative of a sum beam, an azimuth difference beam, an elevation difference beam, and a delta-delta beam; based on the received signals, determining by the processor an azimuth monopulse ratio, an elevation monopulse ratio, a first complementary monopulse ratio based on the ratio of the delta-delta beam to the delta elevation beam, and a second complementary monopulse ratio based on the ratio of the delta-delta beam to the delta azimuth beam; determining an azimuth angle by the processor based on the azimuth monopulse ratio and the first complementary monopulse ratio; determining an elevation angle by the processor based on the elevation monopulse ratio and the second complementary monopulse ratio; providing an output signal indicative of the azimuth angle; and providing an output signal indicative of the elevation angle. | 05-20-2010 |
| 20100214156 | EXTRACTION OF RELATIVE SIGNALS FROM CLOSELY SPACED TARGETS IN A MONOPULSE SYSTEM - Systems and methods are provided for extracting relative signal parameters representing two closely spaced targets from monopulse scan data. A maximum quadrature angle value from the scan data is compared with a threshold quadrature value representing a noise level. A linear polynomial model is utilized if the maximum quadrature angle exceeds the threshold value. The linear polynomial model fits a function of the azimuth angle values and quadrature angle values to a linear function of an exponential parameter derived from the boresight angles to produce polynomial coefficients and determines the relative signal parameters from the polynomial coefficients. A cubic polynomial model is utilized if the maximum quadrature angle fails to exceed the threshold value. The cubic polynomial model fits azimuth angle values to a cubic function of corresponding boresight angles to produce a set of polynomial coefficients and determines the relative signal parameters from the set of polynomial coefficients. | 08-26-2010 |
| 20120013500 | Method of Automatic Target Angle Tracking by Monopulse Radar under Conditions of Interference Distorting Location Characteristic - Method of automatic target angle tracking by sum-and-difference monopulse radar covers radiolocation sphere and specifically monopulse direction finding systems. It can be used in order to increase guidance accuracy, for example, for anti aircraft missiles and of unmanned aerial vehicles to radar targets such as: radio beacons; aerial vehicles reflecting the radio signal that illuminates them; aerial vehicles and ground-based devices radiating radio signals and jamming signals. The aim of the method consists in the assurance of reliability and stability and in the enhancement of guidance accuracy of automatic target angle tracking due to elimination of automatic tracking losses and great errors arising during the influence of the signals of orthogonal polarization or polarization close to it. | 01-19-2012 |
| 20120127025 | Method for Estimating the Angular Position of a Target by Radar Detection and Radar Implementing Said Method - A method of estimating the angular position θ | 05-24-2012 |
| 20120133548 | Method for Direction Finding by Means of Monopulse Formation - A method for direction finding by means of monopulse formation in a radar system with electronically controlled group antenna and analog beam shaping of sum and difference channels, a self-test of the antenna being carried out to identify failed receiving elements, and the result of the self-test going directly into the monopulse formation and the test thereby being error corrected. The result of the self-test is converted into correction values that, independently of the antenna viewing direction, are combined with those from the sum channel signal and the difference channel signals of the antenna. | 05-31-2012 |
| 20120154203 | LOW POWER, SPACE COMBINED, PHASED ARRAY RADAR - A plurality of mini radars that make the radar system conformable to a structure that it is attached or built into. A radar system includes a clock, a plurality of frequency modulated/continuous wave (FM/CW) radar units in signal communication with the clock and a processor in signal communication with the plurality of FM/CW radar units. Each of the plurality of FM/CW radar units includes a row of antenna elements. | 06-21-2012 |
| 20120229328 | RADAR APPARATUS - Provided is a radar apparatus capable of accurately calculating the presence direction of an object. The radar apparatus radiates an electromagnetic wave, receives a reflected wave caused by the electromagnetic wave reflected from the object, and detects the presence direction of the object. The radar apparatus includes: an electromagnetic wave radiating section configured to radiate the electromagnetic wave; a reflected wave reception section configured to receive the reflected wave and detect information about the received reflected wave; and a reflected wave type estimation section configured to determine which the type of the received reflected wave received by the reflected wave reception section is, a single reflected wave which is just reflected from an object, or a composite reflected wave which is composed of a plurality of reflected waves, reflected from different objects, that have interfered with each other, based on the information about the received reflected wave. | 09-13-2012 |
| 20120242534 | SYSTEM, METHOD, AND FILTER FOR TARGET TRACKING IN CARTESIAN SPACE - An angle-only tracking filter includes: a target angle discriminant unit configured to receive sensor signal outputs and form angle only observations of a target relative to an ownship; an ownship navigation filter configured to receive and filter ownship inertial navigation measurements; a model analyzer configured to receive and analyze the ownship inertial navigation measurements and select the order of target kinematics to be determined; and a target kinematics generator coupled to the angle discriminant unit, the navigation filter unit, and the model analyzation unit, including: a first-order filter unit configured to generate a target position from the target angle measurements and the ownship inertial navigation information; a second-order filter unit configured to generate a target velocity from the target angle measurements and the ownship inertial navigation information; and a third-order filter unit configured to generate a target acceleration from the target angle measurements and the ownship inertial navigation information. | 09-27-2012 |
| 20120306685 | RADAR SYSTEM AND DIRECTION DETECTING METHOD - A reflected wave that a transmitted wave is reflected by targets including a stationary target and a moving target is received as receiving signals of at least two reception antennas. A phase difference between beat signals at respective peak frequencies, generated from a transmitting signal and the receiving signals, is calculated. Directions of the targets are calculated in such a manner that the calculated phase difference of the targets is stored in a storage area in advance, it is predicted whether peak frequencies of the plurality of targets overlap each other, a predicted phase difference of the stationary target at the time when the peak frequencies overlap each other is calculated on the basis of the stored phase difference, and a predicted phase difference of the moving target is calculated on the basis of the calculated phase difference and the predicted phase difference of the stationary target. | 12-06-2012 |
| 20130027241 | Split Aperture Monopulse Antenna System - A method and apparatus for processing electromagnetic waves. Electromagnetic waves are transmitted in a selected direction toward a target object from a first array of antenna elements. Scattered electromagnetic waves generated from the electromagnetic waves are received at a first portion of a second array of antenna elements configured to receive the scattered electromagnetic waves in a first direction with respect to the selected direction and at a second portion of the second array of antenna elements configured to receive the scattered electromagnetic waves in a second direction with respect to the selected direction. First information in the scattered electromagnetic waves received by the first portion is subtracted from second information in the scattered electromagnetic waves received by the second portion to form difference data. An elevation angle is identified between a direction of the target object and the selected direction using the difference data. | 01-31-2013 |
| 20130342384 | TARGET-TRACKING RADAR CLASSIFIER WITH GLINT DETECTION AND METHOD FOR TARGET CLASSIFICATION USING MEASURED TARGET EPSILON AND TARGET GLINT INFORMATION - Embodiments of a target classifier and method for target classification using measured target epsilons and target glint information are generally described herein. The target classifier is configured to compare a total epsilon measurement with target glint information to determine whether to the target being tracked corresponds to an intended target type. Based on the comparison, the target classifier may cause target tracking circuitry of a target-tracking radar to either continue tracking the target or break-off from tracking the target. Glint of different target types may be characterized at different ranges and the target's glint characteristics may be used to distinguish intended from non-intended targets. Accordingly, intended targets such as incoming artillery may be distinguished from non-intended targets such as aircraft to help prevent countermeasures from being launched against non-intended targets. | 12-26-2013 |
| 20140002296 | ON-BOARD RADAR APPARATUS, OBJECT DETECTION METHOD, AND OBJECT DETECTION PROGRAM | 01-02-2014 |
| 20140028493 | ON-BOARD RADAR APPARATUS, OBJECT DETECTION METHOD, AND OBJECT DETECTION PROGRAM - An on-board radar apparatus includes a plurality of reception antennas that form a reception array antenna, the reception array antenna having two or more average pitches that do not have the relationship of integral multiplication, and an azimuth detecting unit configured to perform a phase shift so that an azimuth of the target is apparently changed by a predetermined angle, for a signal received by each reception array antenna, to perform an azimuth detection process of detecting the azimuth of the target based on the phase shift result, and to determine that the target is present in the azimuth detection range in the azimuth detection process when it is determined that the azimuths of the target detected based on the phase shift result for the signals received by the respective reception array antennas coincide with each other and to determine that the target is present outside the azimuth detection range when it is determined that the azimuths of the target do not coincide with each other. | 01-30-2014 |
| 20140159945 | Method and Device for Estimating Direction of Arrival - A method for determining a DOA (Direction of Arrival) comprises the following steps: (a) providing at least two antennas arranged with a squint angle; (b) producing at least two base beams between two adjacent base beams; (c) every two virtual beams of the multiple virtual beams which cross together at a specific angle are define to a virtual beam set; (d) synthesizing the two virtual beams of each one of the virtual beam sets to be a monopulse; and (e) determining the DOA of the object according to comparison between magnitude of demodulated signals corresponding to the monopulses. A device for estimating a DOA is also disclosed. | 06-12-2014 |
| 20140292561 | LOW POWER, SPACE COMBINED, PHASED ARRAY RADAR - A radar system including a plurality of mini radars may be conformable to a structure that it is attached or built into. A radar system includes a clock, a plurality of frequency modulated/continuous wave (FM/CW) radar units in signal communication with the clock and a processor in signal communication with the plurality of FM/CW radar units. Each of the plurality of FM/CW radar units includes a row of antenna elements. | 10-02-2014 |
| 20150048970 | ANGULARLY RESOLVING RADAR SENSOR - An angularly resolving radar sensor having multiple antenna elements that, in a direction in which the radar sensor is angularly resolving, are disposed in different positions, and having a control and evaluation device that is designed for an operating mode in which several of the antenna elements transmit signals that are respectively received by several of the antenna elements, and the angle (θ) of a located object is identified on the basis of amplitudes and/or phase relationships between signals which correspond to different configurations of transmitting and receiving antenna elements, wherein the control and evaluation device is embodied to supply several of the transmitting antenna elements simultaneously with identical-frequency signals (f | 02-19-2015 |
| 20150061923 | PHASE MONOPULSE RADAR SYSTEM AND TARGET DETECTING METHOD - A phase monopulse radar system includes a transmitting antenna that transmits a transmission signal, a plurality of receiving antennas that receive reflected waves of the transmission signal as received signals, a target azimuth detecting unit that detects an azimuth of a target based on a phase difference of the received signals received by the receiving antennas, a phase inversion determining unit that determines whether a phase inversion occurs to any one of the received signals, at around a peak frequency of a frequency spectrum of the received signal, and a detection object excluding unit that does not use an azimuth based on the phase difference as a target azimuth, when the phase inversion determining unit determines that the phase inversion occurs. | 03-05-2015 |
| 20160252608 | DIGITAL BEAMFORMING BASED RESOLUTION OF OUT-OF-PATH TARGETS SHOWING UP AS IN-PATH DUE TO GRATING LOBES IN ARRAY ANTENNA RADARS | 09-01-2016 |
| 342152000 | With quadrature difference processing | 2 |
| 20130127655 | RADAR DEVICE - A radar receiver has plural antenna system processors each for performing coherent integration on the basis of correlation values between a reception signal and a transmission signal using correction amounts for phase variations corresponding to plural Doppler frequencies, plural correlation matrix generators for generating, for each of the plural different Doppler frequencies, correlation matrices which are pieces of phase difference information relating to an arrangement of reception antennas on the basis of sets of outputs of the coherent integration, respectively, an adder for adding together outputs of the plural correlation matrix generators, and an incoming direction estimator for estimating an incoming direction of reflection waves on the basis of outputs of the adder. | 05-23-2013 |
| 20180024234 | PULSE RADAR DEVICE | 01-25-2018 |
| 342153000 | With particular antenna or waveguide | 5 |
| 20100060513 | ANTENNA - An antenna is provided, in combination with an associated switch array, the antenna comprising a number of antenna elements mounted above a ground plane for providing coverage over a predetermined range of angles in azimuth using a number of beams. Each of the antenna elements is connected to a switch in the switch array and the switch array is operable to connect selected pairs of the antenna elements to a signal path to thereby generate each of the different beams, at the same time connecting unselected antenna elements to ground. | 03-11-2010 |
| 20110140953 | RADAR APPARATUS - A radar apparatus comprising a transmit/receive antenna having a plurality of channels, comparator means coupled to the antenna channels for providing receive signal sum and difference channels, a radar receiver, means coupling the sum and difference channels to the radar receiver, a radar transmitter for providing a signal to be transmitted, means coupling the transmitter to a cross-channel port of the comparator means, and means for adjusting a phase length of at least one antenna channel so that when the apparatus is transmitting, the transmitted signals from the antenna channels have a required relative phase relationship. | 06-16-2011 |
| 20120007769 | Method of automatic target angle tracking by sum-and-difference monopulse radar and device therefore - Method of automatic target angle tracking by sum-and-difference monopulse radar covers radiolocation sphere and specifically monopulse direction finding systems. It can be used in order to increase guidance accuracy, for example, for anti aircraft missiles and of unmanned aerial vehicles to radar targets such as: radio beacons; aerial vehicles reflecting the radio signal that illuminates them; aerial vehicles and ground-based devices radiating radio signals and jamming signals. The aim of the method consists in the assurance of reliability and stability and in the enhancement of guidance accuracy of automatic target angle tracking due to elimination of automatic tracking losses and great errors arising during the influence of the signals of orthogonal polarization or polarization close to it. | 01-12-2012 |
| 20130307719 | ANTENNA SYSTEM - An antenna system including: an input port configured to receive tracking mode signals, in two orthogonal polarisations, from a target; a tracking coupler, configured to receive the tracking mode signals from the input port, the tracking coupler including: a first pair of opposed slot couplers configured to extract tracking signals from the tracking mode signals in a first one of the orthogonal polarisations, and a second pair of opposed slot couplers configured to extract tracking signals from the tracking mode signals in a second one of the orthogonal polarisations; and a tracking combiner network configured to combine the extracted tracking signals from the pairs of opposed slot couplers to generate tracking output signals for use in controlling the antenna system to track the target. | 11-21-2013 |
| 20160033632 | MIMO ANTENNA WITH ELEVATION DETECTION - A multiple input multiple output (MIMO) antenna for a radar system includes a receive antenna, a first transmit-antenna-arrangement, and a second transmit-antenna-arrangement. The receive-antenna is configured to detect radar-signals reflected by a target toward the receive-antenna. The first transmit-antenna-arrangement includes a first vertical-array of radiator elements and a second vertical-array of radiator elements. The first transmit-antenna-arrangement is configured so the first vertical-array can be selectively coupled to a transmitter independent of the second vertical-array. The second transmit-antenna-arrangement includes a third vertical-array of radiator elements and a fourth vertical-array of radiator elements. The second transmit-antenna-arrangement is configured so the third vertical-array can be selectively coupled to a transmitter independent of the fourth vertical-array. The second transmit-antenna-arrangement is vertically offset from the first transmit-antenna-arrangement by a vertical offset distance selected so an elevation angle to the target can be determined by the receive-antenna. | 02-04-2016 |
| 342154000 | Combined with beam steering | 4 |
| 20120098694 | Beam stabilization for wideband phase comparison monopulse angle estimation with electronically steered antennas - A method for estimating a target angle of a wideband signal received on an electronically steered antenna array includes: generating spatial frequency data from the received wideband signal; stabilizing the spatial frequency data to a beam steering direction; compressing the stabilized spatial frequency data to a plurality of frequency range bins; calculating a monopulse discriminant from the stabilized spatial frequency data; and calculating the target angle using the monopulse discriminant. | 04-26-2012 |
| 20130088381 | SCALABLE, ANALOG MONOPULSE NETWORK - Embodiments of the concepts described herein are directed toward a common RF building block in the form of a monolithic assembly for an AESA array featuring a scalable RF design based on 2 | 04-11-2013 |
| 20150084810 | PHASED ARRAY RADAR WITH MONOPULSE ALGORITHM MEASUREMENT - A phased array radar apparatus and method for identifying targets in an environment includes a phased array radar transmitter, a first phased array radar receiver, a second phased array radar receiver, and a radar controller. The first and second phased array radar receivers are configured such that the first and second phased array radar receivers have effectively the same configuration. The radar controller uses the first and second receive beams to calculate an amplitude monopulse ratio and identify angle information of the targets within the environment. The present invention enables high precision estimation of target angle information while scanning over a wide field of view in a single scan. The radar apparatus further uses a complex amplitude monopulse ratio and a weighted target angle histogram to distinguish between closely separated targets that would otherwise be viewed as a single target by conventional monopulse radar apparatuses. | 03-26-2015 |
| 20160161604 | IMPROVEMENTS IN AND RELATING TO RADAR - A radar apparatus ( | 06-09-2016 |
